// Copyright 2011-2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.transformations;

import com.google.security.zynamics.zylib.gui.zygraph.editmode.CStateChange;
import com.google.security.zynamics.zylib.gui.zygraph.editmode.IMouseState;
import com.google.security.zynamics.zylib.gui.zygraph.editmode.IMouseStateChange;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.AbstractZyGraph;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.CStateFactory;
import java.awt.event.MouseEvent;
import y.view.HitInfo;

/** Utility class to encapsulate state changes for the background. */
public class CHitBackgroundTransformer {
  public static IMouseStateChange exitBackground(
      final CStateFactory<?, ?> m_factory,
      final MouseEvent event,
      final AbstractZyGraph<?, ?> graph,
      final IMouseState state) {
    final double x = graph.getEditMode().translateX(event.getX());
    final double y = graph.getEditMode().translateY(event.getY());

    final HitInfo hitInfo = graph.getGraph().getHitInfo(x, y);

    if (hitInfo.hasHitNodes()) {
      return CHitNodesTransformer.enterNode(m_factory, event, hitInfo);
    } else if (hitInfo.hasHitNodeLabels()) {
      throw new IllegalStateException();
    } else if (hitInfo.hasHitEdges()) {
      return CHitEdgesTransformer.enterEdge(m_factory, event, hitInfo);
    } else if (hitInfo.hasHitEdgeLabels()) {
      return CHitEdgeLabelsTransformer.enterEdgeLabel(m_factory, event, hitInfo);
    } else if (hitInfo.hasHitBends()) {
      return CHitBendsTransformer.enterBend(m_factory, event, hitInfo);
    } else if (hitInfo.hasHitPorts()) {
      return new CStateChange(state, true);
    } else {
      // Nothing was hit at all. The current state remains unchanged.

      return new CStateChange(m_factory.createDefaultState(), true);
    }
  }
}
